Adaptation of Van with a Wheelchair Lifting System Group Eight Members: Bill Fotoples- Team Leader Chad Wainscott- Technical Liaison/Web Page Specialist Ryan Keeler- Purchasing Agent Faculty Advisors- Dr. Hefzy & Dr. Pourazady Client- Ms. Jill Caruso Sponsors- Ability Center and National Science Foundation
03/24/07 Bill Fotoples 2 Problem Statement Sliding door opening is roughly 28” wide Wheelchair is roughly 35”x 26” (footprint) Chair is initially parallel to the van but must be rotated perpendicular to fit through the door With less than 1 inch of clearance on both sides of the chair, the device must be very consistent and accurate
03/24/07 Bill Fotoples 3 Client Preferences No traditional platform lifts Keep it simple - Client is willing and able to “help” the chair into the van however possible Do not decrease resale value of the vehicle by making too many permanent changes Would like to be able to easily transplant the device to a new van in the future
03/24/07 Ryan Keeler 4 Design Ideas 1: Platform Lift2: Side-Bar Lift 3: Under-Seat Lift4: Winch Assisted Lift
03/24/07 Ryan Keeler 5 House of Quality CUSTOMER REQUIREMENTS CUSTOMER IMPORTANCE RATING DESIGN 1: PLATFORM LIFT DESIGN 2: SIDE- BAR LIFT DESIGN 3: UNDER-SEAT LIFT DESIGN 4: WINCH ASSISTED LIFT EASE OF USE54442 EASILY TRANSPLANTED41235 SAFETY44333 RELIABILITY34445 UNINTRUSIVE41235 VALUE
03/24/07 Ryan Keeler 6 Best Option… Design #4 Best design to use with minimal space allowed Easily placed in new vehicle because of plywood base Tracks allow process and placement to be extremely accurate and repeatable
03/24/07 Bill Fotoples 7 3D model of final design Entire assembly is on a 13.5 degree angle in relation to van entrance Inner tracks will be adjustable to allow different width wheelchairs to be used
03/24/07 Bill Fotoples 8 Prototype/Replica Testing and Analysis Constructed mock-up of interior van layout Conducted testing to analyze entry angle, winch placement and ramp assist design
03/24/07 Bill Fotoples 9 Prototype/Replica Testing and Analysis Created computer models based on replica testing to further analyze setup
03/24/07 Chad Wainscott 10 Material Selection Winch Support Beam Material: 3x1x1/8” Rectangular Tubing High strength to weight ratio, easily welded and fabricated 0.25 inch weld to 1/8” steel base Ramp Material: 16 GA (0.060”) Low Carbon Steel Reinforced using track material Base Material: ¾” Plywood - Carpeted Track Material: General-Purpose Low-Carbon Steel 1-½” Leg Length 3/16” Thickness
03/24/07 Chad Wainscott 11 Ramp Calculations AutoCAD was used to analyze ramp to formulate dimensions
03/24/07 Chad Wainscott 12 Winch Support Beam Deflection Analysis
03/24/07 Chad Wainscott 13 Winch Support Beam Weld Analysis
03/24/07 Ryan Keeler 14 HP/Force Requirements
03/24/07 Ryan Keeler 15 Bolt Analysis
03/24/07 Ryan Keeler 16 Bolt Analysis
03/24/07 Ryan Keeler 17 Door assist analysis
03/24/07 Chad Wainscott 18 Timetable
03/24/07 Chad Wainscott 19 Budget ITEMEXPLANATION OF USE PROPOSED COST QUANTIT Y TOTAL PROPOSED COST ACTUAL PURCHASE PRICE WINCHPULL CHAIR INTO VAN$ $53.36 PLYWOODBASE OF ASSEMBLY$ CARPETCOVER BASE AND TRACKS$ ANGLE IRON (1.5" x 6')TRACKS/CHAIR ALIGNMENT$21.002$42.00 PIANO HINGE ATTACH FOLD OUT TRACK EXTENSION $ MISC. (BOLTS, SCREWS, ETC.) INSTALLING COMPONENTS$ DOOR MODIFICATIONSLIDING DOOR ASSIST$ PROTOTYPE MATERIALINITIAL TESTING$ STEEL U-CHANNEL WINCH PLATFORM REINFORCEMENT $ SHEET METAL (3' x2')RAMP/"C" WINCH PLATFORM$36.502$73.00 WINCH HOOKATTACH WINCH TO CHAIR$ MACHINE SHOP LABOR $65/Hr3$ TOTAL W/ LABOR $ TOTAL W/O LABOR $ BUDGET REMAINING $459.64
03/24/07 Bill Fotoples 20 Future Activities Complete FEA analysis of ramp and finalize calculations Finalize CAD drawings for machine shop Order material and begin final assembly
03/24/0721 QUESTIONS?